Structural, Optical, and Arsenic Removal Properties of Sol–Gel Synthesized Fe-Doped TiO<sub>2</sub> Nanoparticles
Pure and Fe-doped TiO<sub>2</sub> nanoparticles were synthesized by the sol–gel method. The samples were characterized by X-ray diffraction, Raman spectroscopy, BET, UV-vis diffuse reflectance spectroscopy, and scanning electron microscopy. The results show a dependence between the cryst...
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MDPI AG
2022-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/19/3402 |
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| author | Francisco Gamarra Jesús Medina Wilson Lanchipa Rocío Tamayo Elisban Sacari |
| author_facet | Francisco Gamarra Jesús Medina Wilson Lanchipa Rocío Tamayo Elisban Sacari |
| author_sort | Francisco Gamarra |
| collection | DOAJ |
| description | Pure and Fe-doped TiO<sub>2</sub> nanoparticles were synthesized by the sol–gel method. The samples were characterized by X-ray diffraction, Raman spectroscopy, BET, UV-vis diffuse reflectance spectroscopy, and scanning electron microscopy. The results show a dependence between the crystallite size and the amount of dopant, which decreases from 13.02 to 12.81 nm. The same behavior was observed in the optical properties, where the band gap decreased from 3.2 to 2.86 eV. The arsenic (V) adsorption was tested in aqueous solution containing 5 mg/L of arsenic and 0.5 g/L of adsorbent at pH 7 and in dark conditions. The results indicate that the TiO<sub>2</sub>-B sample shows a higher arsenic removal, reaching 88% arsenic removal from the water at pH 7. Thus, it is also shown that the best performance occurs at pH 5, where it reaches an arsenic removal of 94%. Ion competition studies show that arsenic removal capacity is slightly affected by chloride, carbonate, nitrate, and sulfate ions. According to the results, the synthesized samples are a promising material for treating arsenic-contaminated water. |
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| language | English |
| last_indexed | 2024-03-09T21:21:53Z |
| publishDate | 2022-09-01 |
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| spelling | doaj.art-924d7f57c5634b9aa1e8bc399541fbb42023-11-23T21:19:26ZengMDPI AGNanomaterials2079-49912022-09-011219340210.3390/nano12193402Structural, Optical, and Arsenic Removal Properties of Sol–Gel Synthesized Fe-Doped TiO<sub>2</sub> NanoparticlesFrancisco Gamarra0Jesús Medina1Wilson Lanchipa2Rocío Tamayo3Elisban Sacari4Laboratorio de Nanotecnología, Facultad de Ingeniería, Universidad Nacional Jorge Basadre Grohmann, Av. Miraflores s/n, Tacna 23003, PerúLaboratorio de Nanotecnología, Facultad de Ingeniería, Universidad Nacional Jorge Basadre Grohmann, Av. Miraflores s/n, Tacna 23003, PerúLaboratorio de Nanotecnología, Facultad de Ingeniería, Universidad Nacional Jorge Basadre Grohmann, Av. Miraflores s/n, Tacna 23003, PerúDepartamento de Ingeniería de Materiales, Facultad de Ingeniería de Procesos, Universidad Nacional de San Agustín, Arequipa 04001, PerúLaboratorio de Nanotecnología, Facultad de Ingeniería, Universidad Nacional Jorge Basadre Grohmann, Av. Miraflores s/n, Tacna 23003, PerúPure and Fe-doped TiO<sub>2</sub> nanoparticles were synthesized by the sol–gel method. The samples were characterized by X-ray diffraction, Raman spectroscopy, BET, UV-vis diffuse reflectance spectroscopy, and scanning electron microscopy. The results show a dependence between the crystallite size and the amount of dopant, which decreases from 13.02 to 12.81 nm. The same behavior was observed in the optical properties, where the band gap decreased from 3.2 to 2.86 eV. The arsenic (V) adsorption was tested in aqueous solution containing 5 mg/L of arsenic and 0.5 g/L of adsorbent at pH 7 and in dark conditions. The results indicate that the TiO<sub>2</sub>-B sample shows a higher arsenic removal, reaching 88% arsenic removal from the water at pH 7. Thus, it is also shown that the best performance occurs at pH 5, where it reaches an arsenic removal of 94%. Ion competition studies show that arsenic removal capacity is slightly affected by chloride, carbonate, nitrate, and sulfate ions. According to the results, the synthesized samples are a promising material for treating arsenic-contaminated water.https://www.mdpi.com/2079-4991/12/19/3402arsenicadsorptiontitaniumirondoping |
| spellingShingle | Francisco Gamarra Jesús Medina Wilson Lanchipa Rocío Tamayo Elisban Sacari Structural, Optical, and Arsenic Removal Properties of Sol–Gel Synthesized Fe-Doped TiO<sub>2</sub> Nanoparticles Nanomaterials arsenic adsorption titanium iron doping |
| title | Structural, Optical, and Arsenic Removal Properties of Sol–Gel Synthesized Fe-Doped TiO<sub>2</sub> Nanoparticles |
| title_full | Structural, Optical, and Arsenic Removal Properties of Sol–Gel Synthesized Fe-Doped TiO<sub>2</sub> Nanoparticles |
| title_fullStr | Structural, Optical, and Arsenic Removal Properties of Sol–Gel Synthesized Fe-Doped TiO<sub>2</sub> Nanoparticles |
| title_full_unstemmed | Structural, Optical, and Arsenic Removal Properties of Sol–Gel Synthesized Fe-Doped TiO<sub>2</sub> Nanoparticles |
| title_short | Structural, Optical, and Arsenic Removal Properties of Sol–Gel Synthesized Fe-Doped TiO<sub>2</sub> Nanoparticles |
| title_sort | structural optical and arsenic removal properties of sol gel synthesized fe doped tio sub 2 sub nanoparticles |
| topic | arsenic adsorption titanium iron doping |
| url | https://www.mdpi.com/2079-4991/12/19/3402 |
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